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Finding the Fourth Proportional to 409.67, 612.97 and 227.20

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Solution

The fourth proportional to 409.67, 612.97 and 227.20 is: 339.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.67 : 612.97 = 227.20 : x
  2. Step 2: Convert to fraction form
    409.67/612.97 = 227.20/x
  3. Step 3: Cross multiply
    409.67x = 612.97 × 227.20
  4. Step 4: Simplify right side
    409.67x = 139,264.68
  5. Step 5: Solve for x
    x = 139,264.68/409.67
  6. Step 6: Final answer
    x = 339.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.